Tubular or hollow body.



No. 756,368. PATENTED APR; 5, 1904. J. A. HURDLB. TUBULAR 0R HOLLOWBODY.

APPLICATION I'ILED JUNE 15, 1903. N0 MODEL.

Fig-.1.

W/ TNESSES:

UNITED STATES iatented April 5. i904.

JULIAN A. HURDLE, OF NEW YORK, N. Y.

TUBULAR OR HOLLOW BODY.

SPECIFICATION forming part of Letters Patent NO. 756,368, dated April 5,1904.

Application filed June 15, 1903. Serial No. 161,629. (No model.)

To all whom it may concern:

Be it known that I, JULIAN A. HURDLE, a citizen of the United States,residing at the borough of Brooklyn, in the city of New York and Stateof New York, have invented an Improvement in Tubular or Hollow Bodies,of which the following is a specification.

This invention relates to a new mechanical device having a spiral orother pathed aperture, perforation, orifice, or hole of anyconfiguration extending through or parallel with the axis of acylindrically-shaped body, or it may be made through or partly through abody of most any shape, and is produced by laminating thin perforated orslotted disks or plates, all of which will be fully describedhereinafter.

The invention consists of a body formed of a series of perforated orslotted disks or plates secured together by any means desirable, eitherby soldering, brazing, riveting, or welding, either electrically orotherwise, the slots aforesaid forming an opening through the entirelength of the body.

In the drawings, Figure 1 represents a perspectlve v1ew in which isshown a serles of.

plates mounted upon a spiral rod or former. Figs. 2 and 3 are face viewsof the disks, showing different-shaped perforations.

Similar letters refer to similar parts throughout the drawings, in which64 represents a spiral rod or former having mounted thereon the disks 6,the group 0 of which are in position to be secured together, if desired,while disk 6 is in position to be forced down and against the group 0.The disk shown in Fig 2. is provided with the perforation f, while thatof Fig. 3 is provided with the cross-shaped perforation.

It has heretofore been desirable by the machinist or mechanic to producea spiral-pathed aperture or perforation through a solid cylinder orother-shaped body. They have in many instances resorted to the art ofcasting; but this mode "of production has long since been abandoned, forthe reason that they were unable to give it the proper finish on itsspiral-pathed hole or perforation through or parallel with the axis of acylindrically-shaped body, the following method and procedure should becarefully observed: The first step to be taken in the matter is toprocure a spiral rod. Then mount upon it any desired number ofthinperforated or slotted disks or plates. They may be circular, polygonal,square, or oblong. In fact, they can be any shape; but the perforationor slot must coincide in shape and dimensions with the cross-section ofthe spiral or other shaped rod. It will be obvious that as the plates ordisks are mounted upon the spiral or helical shaped rod they may befastened one with the other by soldering,

brazing, welding, riveting, or bolting. In this case the entirelamination is made so compact as to make its entire body practicallyhomogeneous, after which the rod may be pushed through the aperture withcase. If the body formed by the lamination should be held rigidly, therod will develop a rotary motion in itself; but if the rod is heldrigidly and the laminated body made to move to and fro it will develop arotary movement in itself. It will be obvious that a mechanical deviceof this character can be used to great advantage when applied to variousappliances and devices developed by the artisans of the present century.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. As a new article of manufacture for mechanical devices, a body formedof a series of perforated disks or plates, some of which have theperforations thereof arranged slightly out of register with each other,and secured together so as to form a body having an opening of anydesired irregular shape through its entire length.

2. As a new article of manufacture for mel In testimony whereof Ihavehereunto signed chanical devices, a body formed by a series of myname tothis specification in the presence perforated disks or plates, laminatedand seof the two subscribing witnesses.

cured together and having the perforations JULIAN A. HURDLE. 5 thereofarranged slightly out of register in Witnesses:

such relation as to form a spiral opening MAXWELL HALL ELLIOTT,

through its entire length. 7 WM. C. MORRILL.

